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Ivanshal [37]
3 years ago
15

A rubber ball weighs 49 N.. a) What is the mass of the ball? (Answer: 5.0 kg). b) What is the acceleration of the ball if an upw

ard force of 69 N is applied? (Answer: 4.0 m/s/s). For a) I used the equation W = Fg = mg, which becomes 49 = m(9.8). This approximates m to 5.0 kg.
---
For b) I used the equation
ΣFy=Fa−W=ma
which becomes 69-49 = 20 N.
I then use equation F = ma which becomes 20 = 5.0a, which makes a
4.0m/s2
Physics
1 answer:
weqwewe [10]3 years ago
4 0
The answer you presented is correct.

For a) I used the equation W = Fg = mg, which becomes 49 = m(9.8). This approximates m to 5.0 kg.
<span>For b) I used the equation
</span><span>ΣFy=Fa−W=ma</span> which becomes 69-49 = 20 N.
I then use equation F = ma which becomes 20 = 5.0a, which makes a <span>4.0m/<span>s2</span></span>
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Explanation:

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Explanation:

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Energy is defined as the ability to do work. There are two main forms of energy which are:

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8 0
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mel-nik [20]

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<h3>Right triangle</h3>

Right triangle have one of its angle as 90 degrees.

Therefore,

The length of the inclined plane is the hypotenuse of the triangle. The length of the inclined plane can be found using trigonometric ratios.

height = 4 ft

angle(∅) = 19.45°

sin 19.45 = 4 / h

h = 4 / 0.33298412235

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NeX [460]

Answer:

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Explanation:

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Hence, (a). The average speed is 51.83 m/s.

(b). The average velocity over one revolution is zero.

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